The Install Piked OS X El Capitan app can be downloaded from the Mac Rumors Forums web site. It can be found at post #1390 on page 56.
It is assumed that you will be working on your Mac Pro 1,1 (2006) or Mac Pro 2,1 (2007) directly. There are other methods of installing Mac OS X El Capitan for a Mac Pro, but these are not covered here...
Before you continue...
- You must have a copy of the official Install OS X El Capitan app in you Applications folder.
- You must have 12Gb of RAM or more installed in your MacPro
Double-click the Install Piked OS X El Capitan app. You will be asked to enter your user name and password to elevate the app’s permissions.
Next: Select A Volume...